<table id="tblCustomers" border="0" cellpadding="0" cellspacing="0">
    <tbody>
        <tr>
            <th style="width: 90px">Customer Id</th>
            <th style="width: 120px">Name</th>
            <th style="width: 90px">Country</th>
        </tr>
        <tr>
            <td>1</td>
            <td>John Hammond</td>
            <td>United States</td>
        </tr>
        <tr>
            <td>2</td>
            <td>Mudassar Khan</td>
            <td>India</td>
        </tr>
        <tr>
            <td>3</td>
            <td>Suzanne Mathews</td>
            <td>France</td>
        </tr>
        <tr>
            <td>4</td>
            <td>Robert Schidner</td>
            <td>Russia</td>
        </tr>
    </tbody>
</table>
<hr />
<input type="button" id="btnDelete" value="Delete Rows" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        $("#btnDelete").click(function () {
            $("#tblCustomers").find("tr:not(:first)").remove();
        });
    });
</script>